/Engine/Source/Runtime/Renderer/Public/SimpleMeshDrawCommandPass.h
BEnableStereo - if true will extract the stereo information from the View and set up two ViewIds for the instance culling, as well as use InstanceFactor = 2 for legacy drawing.
FSimpleMeshDrawCommandPass ( const [FSceneView](API\Runtime\Engine\FSceneView) & View, FInstanceCullingManager * InstanceCullingManager, bool bEnableStereo )